chore: actions: update how the tag version is defined using workflow run

[dkilgore-eightfold]

SUMMARY:

To get the current tag on the workflow_run instead of push, this change uses the github.event.workflow_run.head_commit.tag context in the octuple-publish-alerts workflow.

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[codecov-commenter]

Codecov Report

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Patch has no changes to coverable lines.

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Additional details and impacted files

@@           Coverage Diff           @@
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  Coverage        ?   84.68%           
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  Files           ?      791           
  Lines           ?    16837           
  Branches        ?     5917           
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  Hits            ?    14258           
  Misses          ?     2513           
  Partials        ?       66           

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